Corrugated-paper-board apparatus.



PATENTED PEB. 1 4, 1'905.

J. N. HAHN.

GORRUGATED PAPER BOARD APPARATUS.

APPLICATION FILED JUNE 18, 1904.

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l INVENTOR. 7m k. //w BY. .f/ 7 M ATTORNEY Wl TNESSES.

UNITED STATES Patented February 14, 1905.

PATENT EEicE.

JOHN N. HAHN, OE CLEVELAND, OHIO.

CORRUGATED-PAPER-BOARD APPARATUS.

SPECIFICATION forming part of Letters Patent No. 782,558, dated February 14, 1905.

Application filed June 16, 1904. Serial No. 212,845.

To all whom t may concern:

Be it known that I, JOHN N. HAHN, a citizen ofthe United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Oorrugated-Paper-Board Apparatus; and I do declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the manufacture of corrugated paper-board; and the invention consists in an apparatus or machine which is adapted by successive steps to corrugate, paste, face, dry, and sever the board into sheets or pieces of suitable sizes, all substantially as shown and described, and particularly pointed out in the claims. i

In the accompanying` drawings, Figure l is a plan view of the machine, and Fig. 2 is an elevation thereof, partly in section, and both views are broken out at the middle across the drying-chamber.

In the machine or apparatus thus shown I begin with a Eset or pair of paper-corrugating rolls A, constructed to corrugate the middle or body sheet of paper a transversely, and the said corrugated body or sheet being carried along passes next between two pastingrolls B, one directly over the other and each provided with its own paste-rceptacle O. These rollsare arranged to merely touch the tops of the corrugations or ribs and deposit thereon all the paste needed to secure the facings c. These facings or faces of paper are lmechanically drawn from their respective over the other and spaced apart such distance as to `exert a comparatively slight but yet sufficient .pressure upon the board to make complete the union of the faces b with the corrugated body a; but the pressure thus exerted should in no case tend to crush or flatten the corrugations.

lOn the other hand, I dein unison and each doing a small part in turn' successively as the paste dries to make effective the adhesion by the time the board leaves the drier-chamber. The said chamber may have any suitable length-say thirty tofty feet-and is shown as of box shape and closed all around, withithe rolls E and Fmounted in its sides, and is provided with steam-pipes G in its bottom for furnishing thejnecessary heat. Other sources or lkinds of heat might be used; but I find thatsteam heat is most easily controlled and 'is uniform and regular throughout the chamber and can be made more or less intense, as conditions may require. I might subdivide the chamber transversely and have more heat in one end than in thc other, if preferred.

The upper series of rolls require no direct actuation, but are idlers depending on the traveling paper-board, with which they contact, for their rotation; but the lower carryingrolls have pinions or gears 2 on their spindles or axles outside the box or casing D, which are each engaged by a worm 7L on a shaft H, running the full length of the drier-chamber. This shaft has a gear Sat one end, with which power connection is made, and thus an even rate of speed is imparted to` all said rolls E throughxsaid worm-and-gear mechanism, and the contact through or with the paper-board is uniform and the travel is continuous. Either of the two series of rolls may have the direct mechanical actuation and the other become an idler.

When the dried product-or board 4 reaches the issuing end of the drier, it is stiif as a board and cannotV behandled Vbybending or rolling, and therefore is required to be cut into sizes according to particular needs to complete manufacture. These sizesdepend on the use to be made of the said pieces. In the present machine I employ two -sets of longitudinal slitting cutters or disks L, preferably mounted on shafts 5 and running in advance of the 9 transverse cutters N, mounted on .shafts 6. The latter cutters are shown here as of the real pattern and have blades or knives N compassing the full width of board 4L and arranged to operate in such way that the successive blades IOO on opposite sides meet and sever the board with a straight transverse cut. This or any equivalent shearing or transversely-cutting arrangement may be adopted.l One or both sides of the board may be faced, and the handling of both products proceeds in the same manner practically.

The drying-chamber D stands preferably on legs d and is comparatively shallow in depth, and the board 4 is fed along by the multiple rolls E and F to the two sets of cutters L and N, which may receive the board without other or intervening support, -as shown.

Now the idea of this invention is to produce a perfect and complete product in the smallest space and in the shortest time practicable. Heretofore in all manufactures of this kind familiar to me there has been encountered the apparently insurmountable difficulty of blisteringand imperfect adhesion of the paper sheets upon the corrugated body. Contraction of the corrugations from the moistened state by the fresh paste to the dried state has had much to do with this, and hence I have provided aseries of idler rolls E and power-driven or feed rollsl F, suitably spaced apart on both sides of the triple sheet of stock or board and from each other in the same series to do their work progressively as the stock dries and from step to step in the drying. Blisters will inevitably develop here and there,and as this occurs in the drying they are pressed or ironed out by the succeeding rolls until at last the stock becomes so dry that no further blistering or separation can occur and both outer sheets are evenly and perfectly adhered to the corrugation. A rapid drying of the stock is possible only by successive pressures exerted at suitable intervals through rolls or their equivalent, and it is this feature, especially, of drying and pressing at intervals and successively from the moist to the dry` state and on both sides alike which constitutes the vaiue and novelty of my improved means for producing paper-board or double-faced corrugated paper. Obviously if the travel of the paper be slow through the drying-chamber a shorter chamber may beused than with the same heat and a greater speed of travel; but experience has shown that the drying process cannot safely exceed a comparatively slow rate and that there must be pressing contact every so often as this goes on or the work will be defective. Hence I havefound a fifty-foot drier better than one materially shorter and with rolls from end to end, practically as shown. The Lipper series of rolls are supported in vertical slots 8, in which they can yield more or less and eXert a gravity or yielding pressure. By observing the product the operator will be able to regulate both the volume of heat and the speed of travel. By this construction also each roll is absolutely independent of all the others and makes its own contact with its own weight.

versely of said chamber onedirectly over the,A

other vertically, a continuous drive mechanism engaging one of said series of rolls and the rolls in the other series supported independently of each other and free to rise and fall, substantially as described.

3. In the manufacture of corrugated paperboard, a drier-chamber and two series of transversely-disposed rolls having one roll arranged directly over the other in the same vertical plane and uniform spaces between the rolls from end to end of said chamber, and means to impart a continuous rotation to one of said rolls and cause uninterrupted travel of the paper-board through said chamber, substantially as described.

4. In the manufacture of corrugated paperboard, means to corrugate the middle sheet of paper and to paste the corrugations thereof and means to face the said corrugated sheet on both sides, in combination with a dryingchamber and successive upper and lower rolls of uniform size in said chamber in parallel series, one of said series of rolls havingjpoweractuating connections and the other series of rolls separate from each other, substantially as described.

5. In the manufacture of corrugated paperboard, means to paste the corrugated sheet of paper and to lay facing-paper on both sides of said sheet, in combination with a drier-chamber, a series of free upper idlerrolls and lower power-actuated feed-rolls in series opposite said idler-rolls in said chamber and adapted to engage the said board on opposite sides and convey the same through the drier in a continuous movement, substantially as described.

6. In the manufacture of corrugated paperboard, a suitable drying-chamber and two series of rolls in said chamber one above the other between which the product is conveyed, gears on the lower of said rolls and a worm drive-shaft engaging said gears, and said upper rolls having independent gravity contact with the paper-board, substantially as' described.

7. In the manufacture of corrugated paperboard, a drying-chamber, rolls in two seriesl IOO IIO

8. In the manufacture of corrugated paper- In testimony whereof I sign this specicaboard, a chamber and two series of rolls betion in the presence of two Witnesses. tween which the board is carried forward, in combination with disk-shaped cutters to di- 5 vide the paper longitudinally, and transverse Witnesses:

cutters for said board succeeding said dislc- R. B. MOSER, shaped cutters, substantially as described. C. A. SELL.

JOHN N. HAHN. 

